74154 4 to 16 Line Decoder

Pin Arrangement

Truth Table

INPUTS						OUTPUTS
ENABLE		SELECT
G1'	G2'	D	C	B	A	Y0	Y1	Y2	Y3	Y4	Y5	Y6	Y7	Y8	Y9	Y10	Y11	Y12	Y13	Y14	Y15
X H L L L L L L L L L L L L L L L L	H X L L L L L L L L L L L L L L L L	X X L L L L L L L L H H H H H H H H	X X L L L L H H H H L L L L H H H H	X X L L H H L L H H L L H H L L H H	X X L H L H L H L H L H L H L H L H	H H L H H H H H H H H H H H H H H H	H H H L H H H H H H H H H H H H H H	H H H H L H H H H H H H H H H H H H	H H H H H L H H H H H H H H H H H H	H H H H H H L H H H H H H H H H H H	H H H H H H H L H H H H H H H H H H	H H H H H H H H L H H H H H H H H H	H H H H H H H H H L H H H H H H H H	H H H H H H H H H H L H H H H H H H	H H H H H H H H H H H L H H H H H H	H H H H H H H H H H H H L H H H H H	H H H H H H H H H H H H H L H H H H	H H H H H H H H H H H H H H L H H H	H H H H H H H H H H H H H H H L H H	H H H H H H H H H H H H H H H H L H	H H H H H H H H H H H H H H H H H L

Electrical Characteristics

Propagation Delay

Input	Output	N	LS	ALS	ALS 1000	F	S	AS	AS 1000	HC	HCT	Unit [max]
G1',G2'	Y0' - Y15'	30	30	-	-	-	-	-	-	42	-	nS
A,B,C,D		36	36	-	-	-	-	-	-	42	-	nS




Input Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	Unit
All inputs	High	40	20	-	-	-	-	-	-	uA
	Low	1.6	0.36	-	-	-	-	-	-	mA




Output Characteristics

		N	LS	ALS	ALS 1000	F	S	AS	AS 1000	HC	HCT	Unit
All outputs	High	0.8	0.4	-	-	-	-	-	-	4	-	mA
	Low	16	8	-	-	-	-	-	-	4	-	mA

Reference

Open Collector type : 74159
Dual 2 to 4 Line Decoder : 74139
3 to 8 Line Decoder : 74138

Equivalent Circuit